Know Your Lens Model and Other Metadata Tricks in Aperture

Inside Aperture Podcast 30

Would you like to know the exact lens you used for every shot in your
Aperture library? In this podcast with Joe Schorr, Derrick Story
learns about the new "Lens Model" field and how to use it. Plus Joe
explains how to update your previously uploaded images in Aperture to
also display this information. Other helpful techniques include
tapping the power of the Query HUD and changes in Aperture 2 to help
you better look inside Stacks.

The Lens Model field is very useful. Say that you have two different
models of a 70-200mm zoom -- f/4 and f/2.8 versions, and you want to
know which lens you used for a particular shoot. The Lens Model field
will distinguish between the two. By default, this field should
appear in the "General" metadata view. If yours isn't displaying it,
then click on the EXIF tab at the bottom of the view and check the
box next to Lens Model. You can move the field to any position you
want by clicking on its label and dragging. You can also create
custom metadata fields that include just the information you're
interested in.